Question

A force of 5N gives a mass 'Mi' an acceleration of 10 m/s2
and a mass "M' an acceleration 20m/s? What
acceleration would it give if both the masses were tied
together?
(a) 6.67 m/s2
(c) 7 m/s2
(b) 4 m/s2
(d) 10 m/s2​

Answer 1

Answer:

Using Newton's second law,

F = m a

5 = M1 × 10

M1 = 5/10 = 0.5 kg

And

5 = M2 × 20

M2 = 5/20 = 0.25 kg

Total mass = 0.5 + 0.25 = 0.75 kg

Now as per question,

Let common acceleration is a,

F = (M1 +M2) ×a

5 = 0.75 × a

a = 5/0.75 =500/75 = 6.67 m/s²

So the answer will be (a) 6.67 m/s2.

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